Extending / Storage Layer /
Hydration & Persistence

To provide flexibility within Bolt's different field types there needs to be two
sub-processes that happen when data is converted between data rows and PHP
objects and in reverse when committing PHP objects to the storage layer.

Throughout the documentation these processes will be referred to as
Hydration and Persistence. Hydration occurs when data from the
storage layer is converted into PHP objects, and in the reverse situation when a
PHP object is passed to the storage layer conversions will happen in the
opposite direction.